Is current harmful when it doesn't flow out of you?

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The discussion centers on whether electric current is harmful when it cannot flow out of the body, using a vacuum scenario to eliminate grounding issues. It is established that damage occurs due to the flow of electrons, which requires a potential difference to induce current through the body. Electrical components can build up charge without immediate damage, but a rapid discharge can cause harm due to high current. Birds sitting on power lines illustrate that they can maintain the same voltage as the line without harm due to their low capacitance, resulting in minimal charge flow. Overall, the key takeaway is that current is harmful primarily when it flows through a conductor, such as the human body or sensitive electronic components.
  • #31
For the initial approach, that formula is correct, but I don't see where your GJ value comes from - the current won't flow for milliseconds.
 
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  • #32
mfb said:
For the initial approach, that formula is correct, but I don't see where your GJ value comes from - the current won't flow for milliseconds.

Yeah I don't really know how long the current flows for so I just plugged in a few small numbers. Do you know approximately how long that current flows usually?

Nvm I figured out how to work out the time.
 
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  • #33
mfb said:
For the initial approach, that formula is correct, but I don't see where your GJ value comes from - the current won't flow for milliseconds.

If I am not grounded (eg stand on a plastic stool) and touch a Van de Graaff generator, is it reasonable to model myself in this case as a capacitor? (using equations like I=(V/R)exp(-t/CR))

If I touch the Van de Graaf generator with a metal rod (still standing on the plastic stool), can I still model myself as a capacitor by simply taking the new resistance as my own resistance+the metal rod's resistance?

Thanks.
 
  • #34
That should give a good approximation. But don't test it in practice...
 

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